[Goblet-cell carcinoid tumor of the appendix (invasive mucinous adenoma)]

Goblet-cell carcinoid of the vermiform process is a well-differentiated epithelial tumor consisting predominantly of mucus-forming cells among which endocrine and Paneth's cells are found not infrequently. Despite the invasive nature of the tumor growth, the prognosis of the disease is most frequently favourable, although not as much as in carcinoid of the vermiform process. Considering the cell composition and the level of the tumor tissue differentiation, the so-called goblet-cell carcinoid should be regarded as a peculiar invasive mucous adenoma but not as a variety of carcinoid (apudoma).